[1]叶勇,徐西鹏.岩石细观强度离散元数值模拟中颗粒形状的影响[J].华侨大学学报(自然科学版),2008,29(4):498-501.[doi:10.11830/ISSN.1000-5013.2008.04.0498]
　YE Yong,XU Xi-peng.Effect of Particle Shape in the Numerical Simulation of the Rock Mesoscopical Strength by Distinct Element Method[J].Journal of Huaqiao University(Natural Science),2008,29(4):498-501.[doi:10.11830/ISSN.1000-5013.2008.04.0498]
点击复制

岩石细观强度离散元数值模拟中颗粒形状的影响()
分享到：

《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第29卷
期数:
2008年第4期
页码:
498-501
栏目:
出版日期:
2008-10-20

文章信息/Info

Title:
Effect of Particle Shape in the Numerical Simulation of the Rock Mesoscopical Strength by Distinct Element Method
文章编号:
1000-5013(2008)04-0498-04
作者:
叶勇; 徐西鹏
华侨大学机电及其自动化学院
Author(s):
YE Yong;  XU Xi-peng
College of Mechanical Engineering and Automation, Huaqiao University, Quanzhou 362021, China
关键词:
岩石;  离散单元法;  细观;  数值模拟;  单元组合形式
Keywords:
rock;  distinct element method;  mesocopic;  numerical simulation;  element combination style
分类号:
P584
DOI:
10.11830/ISSN.1000-5013.2008.04.0498
文献标志码:
A
摘要:
利用离散单元法,对3种不同成分的岩石样本进行强度数值模拟.通过改变岩石内部颗粒大小和形状,获得各个样本不同的强度值; 利用颗粒形貌规律,分析岩石离散元建模时颗粒的组建规则.在不同单元组合方式下,进行双轴压缩试验和4点抗弯试验.结果表明,单一的圆盘形或圆球形模拟单元不能真正反映岩石内部的组织结构; 弹性模量、抗压强度、抗弯强度和裂纹起始应力都随着单元组合方式不同而不同,单元组合方式越复杂,其数值也越大; 配置不同单元组合形式的比例构建DEM样本,可以合理地模拟出岩石的细观强度值.
Abstract:
Strength of three kinds of different component rocks were simulated by discrete element method(DEM).Different strength values of specimen were obtained by varying size and shape of rock particles,and modeling rules was studied by using shape law.Biaxial-compression test and four-point bending test were carried under different element combination style.The results show that single circle or sphere shape element can not really simulate the component and conformation of rocks,and elastic modul,compression strength,bending strength and crack initializtion stress vary with the different element combination style,and high strength value consists with complex combination.Rational mesocopic strength values of rocks can be obtained from the simulation results by configuring different proportion of element combination style to construct DEM specimen.

参考文献/References:

[1] CUNDALL P A. A compute model for simulating progressive large scale movements in blocky rocksystems [A]. Nanka, Moscow, 1971.28-212.
[2] 张锐, 李建桥, 李因武. 离散单元法在土壤机械特性动态仿真中的应用进展 [J]. 农业工程学报, 2003(1):16-19.doi:10.3321/j.issn:1002-6819.2003.01.004.
[3] OLLE S, PER-LENNART L. On discrete element modelling of compaction of powders with size ratio [J]. Computational Materials Science, 2004, (31):131-146.doi:10.1016/j.commatsci.2004.02.005.
[4] IBUKI T, OIDA A. Simulation to analyze the interaction between soil and a tire lug by distinct element method [A]. Umea, 2000.87-94.
[5] CUNDALL P A. A computer model for simulation progressive large scale movements of blocky rock systems [A]. Nanka, Moscow, 1971.11-18.

相似文献/References:

[1]沈国浪,童昕,李占福.应用GA-BP神经网络优化平摆复合振动筛的振动参数[J].华侨大学学报(自然科学版),2018,39(4):509.[doi:10.11830/ISSN.1000-5013.201803010]
　SHEN Guolang,TONG Xin,LI Zhanfu.Application of GA-BP to Optimize Vibration Parameters of Vibrating Screen of Translation-Swing Composite Motion[J].Journal of Huaqiao University(Natural Science),2018,39(4):509.[doi:10.11830/ISSN.1000-5013.201803010]
[2]吕宁,房怀英,杨建红,等.立轴冲击破碎机锤头磨损形式的确定[J].华侨大学学报(自然科学版),2019,40(3):305.[doi:10.11830/ISSN.1000-5013.201806054]
　LÜ,Ning,FANG Huaiying,et al.Determination of Hammer Wear Type of Vertical Shaft Impact Crusher[J].Journal of Huaqiao University(Natural Science),2019,40(4):305.[doi:10.11830/ISSN.1000-5013.201806054]

备注/Memo

备注/Memo:
华侨大学科研基金资助项目(07HZR12)
更新日期/Last Update: 2014-03-23